CN106898784A - A kind of processing method of fuel cell metal double polar plates - Google Patents
A kind of processing method of fuel cell metal double polar plates Download PDFInfo
- Publication number
- CN106898784A CN106898784A CN201710111819.9A CN201710111819A CN106898784A CN 106898784 A CN106898784 A CN 106898784A CN 201710111819 A CN201710111819 A CN 201710111819A CN 106898784 A CN106898784 A CN 106898784A
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- processing method
- fuel cell
- polar plates
- double polar
- metal
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/86—Inert electrodes with catalytic activity, e.g. for fuel cells
- H01M4/88—Processes of manufacture
- H01M4/8875—Methods for shaping the electrode into free-standing bodies, like sheets, films or grids, e.g. moulding, hot-pressing, casting without support, extrusion without support
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/30—Hydrogen technology
- Y02E60/50—Fuel cells
Abstract
The invention discloses a kind of processing method of fuel cell metal double polar plates, comprise the following steps：Sheet metal is pressed into design requirement, multiple metal substrates are cut to, it is standby；The metal substrate is positioned in mould, using heat pressure forming process or SPF Technology, the processing of dashpot and interface channel is carried out during shaping；The metal substrate after two pieces of above-mentioned processing is taken, under high temperature, high vacuum condition, two pieces of weld zones of metal substrate is welded using thermofussion welding mode, obtain bipolar plates；Above-mentioned processing method has the advantages that high yield rate, No leakage, undeformed, convenient installation.
Description
Technical field
The present invention disclose and is related to the technical field of fuel cell, more particularly to a kind of fuel cell metal double polar plates add
Work method.
Background technology
Fuel cell is the TRT that a kind of chemical energy that will be present in fuel and oxidant is converted into electric energy,
And bipolar plates are one of important building blocks in fuel cell.Bipolar plates in existing fuel cell are broadly divided into two kinds, one
It is graphite bi-polar plate to plant, and another kind is metal double polar plates.
Wherein, because graphite has brittle nature in itself, cause the difficulty of processing of graphite bi-polar plate big, high processing costs,
And the assembling of finished product pole plate is also more difficult, cause to use limitation larger.Especially graphite is porous material, and bipolar plates are needed
Several millimeters of thickness is wanted, for ensuring separating for reacting gas, therefore, cause the weight and volume of graphite bi-polar plate larger,
It is unfavorable for using.
Existing metal double polar plates compared with graphite bi-polar plate, metal double polar plates have that the cost of raw material is low, intensity is high, plus
Work mode flexibly, power/volume than it is big the advantages of.But existing metal double polar plates mainly use cold pressing forming process, carry out pole plate
The processing of upper dashpot and interface channel, i.e., carry out drawing and forming of colding pressing to sheet metal using hydraulic press and mould, but
In cold pressure procedure, the deformation of sheet material is larger, and the easy injury of stretch zones has crackle, easily causes double-polar plate gas leakage phenomenon and group
The problems such as dress out-of-flatness.Additionally, the sheet metal after cold moudling also needs to use Laser Welding, in TIG welderings or pulse laser welding
A kind of welding manner, the weld zone of two pieces of sheet metals is fixed welding, however, due to the choosing of above-mentioned welding manner
Select, cause the bipolar plates after welding easily to produce the great deformation state of gas leakage, to assembling and using bringing great hidden danger.
Therefore, a kind of processing method of new metal double polar plates how is researched and developed, to solve the above problems, as people urgently
Problem to be solved.
The content of the invention
In consideration of it, the present disclosure provides a kind of processing method of fuel cell metal double polar plates, at least to solve
The easy generation pole plate gas leakage that existing metal double polar plates processing method is present, the problems such as to assembling and using hidden danger is brought.
The technical scheme that the present invention is provided, specifically, a kind of processing method of fuel cell metal double polar plates, the processing
Method, comprises the following steps：
Sheet metal is pressed into design requirement, multiple metal substrates are cut to, it is standby；
The metal substrate is positioned in mould, using heat pressure forming process or SPF Technology, in the mistake of shaping
The processing of dashpot and interface channel is carried out in journey；
The metal substrate after two pieces of above-mentioned processing is taken, under elevated temperature in vacuo, the weld zone of two pieces of metal substrates is adopted
Welded with thermofussion welding mode, obtained bipolar plates.
It is preferred that, the processing method of the fuel cell metal double polar plates also comprises the following steps：After sweat soldering
Bipolar plate surfaces do anti-corrosion treatment or plate metal protection layer.
Further preferably, the processing method of the fuel cell metal double polar plates, also comprises the following steps：In thermofussion welding
The dashpot and interface channel surface for connecing rear bipolar plates do anti-corrosion treatment, Gold plated Layer or silver coating.
Further preferably, the processing temperature of the heat pressure forming process be 600~950 DEG C, tonnage be 0.5~500
Mold clamping force, hot forming time are 1~5 minute.
Further preferably, the superplastic forming is shape gas, is filled with the amount of inert gas in mould for 0.5~10Kg,
The time is filled with for 0.1~1min, forming temperature is 600~1000 DEG C.
Further preferably, the welding temperature of the thermofussion welding is 600~1100 DEG C, and the vacuum of welding is 10-3, welding pressure
Power is 0.5~500T, and inert gas pressure is 0.5~10Kg.
Further preferably, the material of the metal double polar plates is titanium alloy, Ni-based conjunction or stainless steel.
Further preferably, the thickness of the sheet metal is 0.1~0.5mm.
The processing method of the fuel cell metal double polar plates that the present invention is provided, by using hot forming/superplastic forming
With effective cooperation of thermofussion welding twice manufacturing procedure, the metal double polar plates presence obtained using conventional processing method can be effectively solved
The problems such as gas leakage and difficult assembling.Specifically, hot forming and superplastic forming are the shaping works for carrying out under the high temperature conditions
Skill, processed metal substrate is heated for face, metal substrate will not be produced damage and deformation injury, and by being hot pressed into
Metal substrate after shape/superplastic forming processing, in the state of high temperature, is directly put into heating Welding, and temperature change is small, and
And whole metal substrate is also the state that face is heated during thermofussion welding, is unlikely to deform, and can be prevented effectively from the generation of leak source.
Specific embodiment
Here exemplary embodiment will be illustrated in detail, the implementation method described in following exemplary embodiment
Do not represent all implementation methods consistent with the present invention.Conversely, they be only with as described in detail in appended claims
, the example of some consistent methods of aspect of the invention.
In order to solve the easy generation pole plate gas leakage that conventional metal double polar plates processing method is present, to assembling and using bringing
The problems such as hidden danger, present embodiment provides a kind of processing method of fuel cell metal double polar plates, the tool of the processing method
Body process is as follows：
1) sheet metal is pressed into design requirement, is cut to multiple metal substrates, it is standby；
2) metal substrate after cutting out is positioned in mould, by the way that hot forming machine is using heat pressure forming process or passes through
Superplastic forming machine uses SPF Technology, and the processing of dashpot and interface channel is carried out in forming process, wherein, every
Forming machine can realize the processing of single multi-disc sheet metal；
3) take step 2) in two pieces of metal substrates after processing and forming, under elevated temperature in vacuo, by two pieces of metal substrates
Weld zone welded using thermofussion welding mode, obtain bipolar plates.
Step 3) in thermofussion welding can not only realize the welding of double-deck pole plate, but also sandwich construction pole plate can be realized
Welding.Additionally, during sweat soldering, the circulation groove of the various labyrinths of secondary operation and close can also be simultaneously carried out
Sealing groove.
Wherein, step 1) in heat pressure forming process processing temperature for 600~950 DEG C, tonnage be 0.5~500 close
Mould power, hot forming time are 1~5 minute；Step 1) in superplastic forming be shape gas, be filled with the amount of inert gas in mould
It is 0.5~10Kg, is filled with the time for 0.1~1min, forming temperature is 600~1000 DEG C.
Step 2) in the welding temperature of thermofussion welding be 600~1100 DEG C, the vacuum of welding is 10-3, welding pressure is 0.5
~500T, inert gas pressure is 0.5~10Kg.
Used as the improvement of scheme, after sweat soldering operation, bipolar plate surfaces that can be after sweat soldering do anticorrosion
Metal protection layer is processed or plates, with anti-oxidant, corrosion-resistant and increase electric conductivity.Can also after sweat soldering operation,
Anti-corrosion treatment, Gold plated Layer or silver coating are done in the dashpot of bipolar plates and interface channel surface after sweat soldering so that gold
The electric conductivity for belonging to bipolar plates is strong, has the advantages that performance stabilization.
The material of above-mentioned metal double polar plates is chosen as titanium alloy, Ni-based conjunction or stainless steel, and its thickness is preferably 0.1~
0.5mm。
The metal double polar plates processing method provided in the present embodiment, the processing method with metal double polar plates in the prior art
Compare, with following advantage.
For, molding procedure：
Existing cold moudling operation, is in the state of low temperature, to carry out drawing and forming of colding pressing, and easily causes substrate entirety
Uneven distribution, the especially stretch zones in substrate can easily produce injured crackle, gas leak phenomenon easily occur, additionally, in substrate
In drawing process, it is also easy to substrate entirety out-of-flatness occur, and assembled belt carrys out difficulty.
And heat pressure forming process of the invention and SPF Technology, it is during integrally being heated to metal substrate
The moulding process for carrying out, whole forming process is heated for substrate integral face, and in the absence of the uneven problem of stretching, thin and thick is uniform, has
Effect solves the problems, such as gas leakage, not to the deformation of generation metal substrate, ease of assembly, long service life, reliable in quality.
2nd, for welding sequence：
Existing welding sequence, selection is Laser Welding, TIG welderings or pulse laser welding, and the maximum of said welding method is special
Point by the metal substrate after cold moudling, enters into welding sequence, if only to welding region to be soldered thing for point is heated
Heating welding is carried out, thermal deformation phenomenon easily occurs, face of weld is of poor quality, easily cause burn-through, produce gas leakage, and if adopted
With adhesion process, its uniformity and sealing are all difficult to ensure that, have a strong impact on the performance of battery.
And the sweat soldering in the present invention, it is to cooperate with moulding process, is processed when by moulding process
The metal substrate of shaping, without being lowered the temperature, can directly enter sweat soldering operation, and the process temperature change of whole processing is small,
The problem of temperature deformation can be prevented effectively from, and sweat soldering also has the advantage that and feature：
1) sweat soldering is integrally plastically deformed very little, and postwelding workpiece is typically no longer processed；
2) sealing after sweat soldering in polar plate flow passage will not produce any gas leak phenomenon；
3) secondary SPF Technology can be carried out after sweat soldering carries out the sealed groove process shaping of various complexity；
4) the metal plate runner of hot melt welding structure is accurate, reach 100% without leakage, yield rate.
5) using the metal double polar plates after sweat soldering, integral thickness is thin, long service life, and anticorrosion power is by force, absolutely not
Any gas leakage is had, simple and convenient assembly is quick.
Detection case：
The method that technical staff provides according to the embodiment above respectively：Hot forming/superplastic formation+sweat soldering work
Skill；And the method for prior art：Cold moudling+common welding, has carried out 100 groups of processing of metal double polar plates respectively,
Then, gas leakage and flatness detection are carried out substantially to the metal after processing respectively, concrete outcome is as follows：
| Detection project | Gas leakage number | Pole plate deforms number |
| The present embodiment | 0 | 0 |
| Prior art | 40 | 60 |
Those skilled in the art considering specification and after putting into practice invention disclosed herein, will readily occur to it is of the invention its
Its embodiment.The application is intended to any modification of the invention, purposes or adaptations, these modifications, purposes or
Person's adaptations follow general principle of the invention and including undocumented common knowledge in the art of the invention
Or conventional techniques.Description and embodiments are considered only as exemplary, and true scope and spirit of the invention are by following
Claim is pointed out.
It should be appreciated that the invention is not limited in the implementation method being described above, and can not depart from
Its scope carries out various modifications and changes.The scope of the present invention is only limited by appended claim.
Claims (8)
1. a kind of processing method of fuel cell metal double polar plates, it is characterised in that comprise the following steps：
Sheet metal is pressed into design requirement, multiple metal substrates are cut to, it is standby；
The metal substrate is positioned in mould, using heat pressure forming process or SPF Technology, during shaping
Carry out the processing of dashpot and interface channel；
The metal substrate after two pieces of above-mentioned processing is taken, under high temperature, vacuum condition, by two pieces of weld zones of metal substrate using heat
Melting welding mode is welded, and obtains bipolar plates.
2. the processing method of fuel cell metal double polar plates according to claim 1, it is characterised in that also including following step
Suddenly：Bipolar plate surfaces after sweat soldering do anti-corrosion treatment or plate metal protection layer.
3. the processing method of fuel cell metal double polar plates according to claim 1, it is characterised in that also including following step
Suddenly：Anti-corrosion treatment, Gold plated Layer or silver coating are done in the dashpot of bipolar plates and interface channel surface after sweat soldering.
4. the processing method of fuel cell metal double polar plates according to claim 1, it is characterised in that the hot forming
The processing temperature of technique is 600~950 DEG C, tonnage is 0.5~500 mold clamping force, the hot forming time is 1~5 minute.
5. the processing method of fuel cell metal double polar plates according to claim 1, it is characterised in that the superplastic forming
It is shape gas, is filled with the amount of inert gas in mould for 0.5~10Kg, be filled with the time for 0.1~1min, forming temperature is
600~1000 DEG C.
6. the processing method of fuel cell metal double polar plates according to claim 1, it is characterised in that the thermofussion welding
Welding temperature is 600~1100 DEG C, and the vacuum of welding is 10-3, welding pressure is 0.5~500T, and inert gas pressure is 0.5
~10Kg.
7. according to the processing method of any fuel cell metal double polar plates of claim 1~6, it is characterised in that described
The material of metal double polar plates is titanium alloy, Ni-based conjunction or stainless steel.
8. the processing method of fuel cell metal double polar plates according to claim 1, it is characterised in that the sheet metal
Thickness be 0.1~0.5mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201710111819.9A CN106898784A (en) | 2017-02-28 | 2017-02-28 | A kind of processing method of fuel cell metal double polar plates |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710111819.9A CN106898784A (en) | 2017-02-28 | 2017-02-28 | A kind of processing method of fuel cell metal double polar plates |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109852932A (en) * | 2019-02-20 | 2019-06-07 | 金华市畔星科技有限公司 | Hydrogen fuel battery metal bi-polar plate and preparation method thereof |
| CN110474066A (en) * | 2018-05-11 | 2019-11-19 | 国家电投集团氢能科技发展有限公司 | The bipolar plates and its moulding process of fuel cell |
| CN112490463A (en) * | 2020-11-16 | 2021-03-12 | 广州合之源氢能科技有限公司 | Method for manufacturing fuel cell bipolar plate |
| CN116154208A (en) * | 2022-12-11 | 2023-05-23 | 同济大学 | High-precision high-corrosion-resistance titanium bipolar plate for fuel cell, preparation method thereof and die assembly |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1402891A (en) * | 1999-11-30 | 2003-03-12 | 燃料电池能有限公司 | Bipolar separator plate with improved wet seals |
| CN1692515A (en) * | 2003-12-12 | 2005-11-02 | Lg电子株式会社 | Bipolar plate of fuel cell |
| CN101091276A (en) * | 2004-10-07 | 2007-12-19 | 通用汽车公司 | Bipolar plate with enhanced stability |
| CN101743657A (en) * | 2007-07-09 | 2010-06-16 | 蒂森克虏伯钢铁欧洲股份公司 | Bipolar plate for a fuel cell and fuel cell stack |
| CN105328328A (en) * | 2015-10-12 | 2016-02-17 | 中国石油大学(华东) | Super-plasticity diffusion connecting clamp and technology for metal bipolar plate |
-
2017
- 2017-02-28 CN CN201710111819.9A patent/CN106898784A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1402891A (en) * | 1999-11-30 | 2003-03-12 | 燃料电池能有限公司 | Bipolar separator plate with improved wet seals |
| CN1692515A (en) * | 2003-12-12 | 2005-11-02 | Lg电子株式会社 | Bipolar plate of fuel cell |
| CN101091276A (en) * | 2004-10-07 | 2007-12-19 | 通用汽车公司 | Bipolar plate with enhanced stability |
| CN101743657A (en) * | 2007-07-09 | 2010-06-16 | 蒂森克虏伯钢铁欧洲股份公司 | Bipolar plate for a fuel cell and fuel cell stack |
| CN105328328A (en) * | 2015-10-12 | 2016-02-17 | 中国石油大学(华东) | Super-plasticity diffusion connecting clamp and technology for metal bipolar plate |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110474066A (en) * | 2018-05-11 | 2019-11-19 | 国家电投集团氢能科技发展有限公司 | The bipolar plates and its moulding process of fuel cell |
| CN109852932A (en) * | 2019-02-20 | 2019-06-07 | 金华市畔星科技有限公司 | Hydrogen fuel battery metal bi-polar plate and preparation method thereof |
| CN112490463A (en) * | 2020-11-16 | 2021-03-12 | 广州合之源氢能科技有限公司 | Method for manufacturing fuel cell bipolar plate |
| CN116154208A (en) * | 2022-12-11 | 2023-05-23 | 同济大学 | High-precision high-corrosion-resistance titanium bipolar plate for fuel cell, preparation method thereof and die assembly |
| CN116154208B (en) * | 2022-12-11 | 2024-03-12 | 同济大学 | High-precision high-corrosion-resistance titanium bipolar plate for fuel cell, preparation method thereof and die assembly |
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Application publication date: 20170627 |